When: 2018-10-03

Collection location: Susquehanna Riverlands, Pennsylvania, USA [Click for map]

Who: Dave W (Dave W)

Specimen available

Not sure if I preserved this. So many mushrooms lately!

Didn’t record spore color, but the photo appears to show pigmented spores.


Hymenial cystidia.

Proposed Names

29% (1)
Recognized by sight

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Thanks Ryan.
By: Dave W (Dave W)
2018-10-14 22:20:18 EDT (-0400)

A. arvalis looks like a good possibility. Despite a lack of decent notes, I hoped maybe somebody would recognize this rather distinctive mushroom. (I had thought I’d simply remember relevant details, but then I got pretty much inundated with all sorts of mushrooms to examine and this one was momentarily forgotten.)

I’m pretty sure the spore print was brown, but I failed to record the color and as such felt a bit insecure about proposing “Agrocybe” for this mushroom that I did not recognize. Another thing that I think I remember is that what looks like an annulus was actually just a bend/crack in the stipe.

Here’s something I do remember. Habitat was a pile of wood chips/debris.

Estimate of spore dimensions: 9-10 × 4.5-6, which appears to fit A. arvalis (except maybe a bit low on the minimum for the width).

I think the cystidia seen in the 5th photo are cheilo. Added another photo of hymenial cystidia which look a little different. No “fingerlike projections” seen, but my scope may not be good enough to capture such a detail. There does appear to be some sort of vaguely portrayed ornamentation on the apices.

Good source of info for A. arvalis is 252465.

Created: 2018-10-13 22:47:00 EDT (-0400)
Last modified: 2018-12-19 12:35:20 EST (-0500)
Viewed: 37 times, last viewed: 2019-04-30 14:46:58 EDT (-0400)
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